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Question- A rectangle of length 6.65 in., height 4.03 cm, and depth 343 mm has a mass of 114.1 ounces. What is the density of the material in grams per centimeters?
I want you to clarify the chemistry in this above problem.
A student is asked to prepare a buffer solution at pH = 8.60, using one of the following weak acids: HA (Ka = 2.7 X 10^-3) HB (Ka= 4.4X10^-6) and HC (Ka = 2.6 X 10^-9). Which acid should she choose? Why? (Hint: pKa = -logKa)
Determine the pressures of one gram (each) of gaseous H2, He, N2 and Ar, where each sample is contained in a volume of one liter at 0 degrees centigrade. Which sample has the greatest pressure under the conditions stated. Which sample has the leas..
Use the Heisenberg uncertainty principle to calculate the uncertainty (in meters) in the position of a honeybee weighing 0.65g and traveling at a velocity of 0.90m/s
The vapore pressure of water at 16 degree celsius is 13.6 torr and it is 15.5 torr at 18 degree celsius. what is the vapore pressure at 17 degree celsius
The best design for rockets is one in which both fuel materials run out at the same time to minimize excess mass. If the total mass of both components in a decaborane/oxygen rocket must be 1.951E+6g, what mass of liquid oxygen should be used
Explain what is the pH of a solution made by mixing 30.00mL of 0.10 M acetic acid with 30.00 mL of 0.10 M KOH. Presume that the volumes of the solutions are additive. Ka=1.8 x 10-5 for CH3CO2H.
spontaneous chemical reactions produce products which are more energetically stable than the reactants which form them. A strong acid reacts with a strong base to produce water and the free ions of a salt.
Explain solids, liquids and gases in terms of how they fill a container, Utilize your descriptions to identify the physical state at room temperature of the subsequent 1.helium in a toy balloon. 2. Mercury in a thermometer. 3. Soup in a bowl
Calculate the work energy, w, gained or lost by the system when a gas expands from 15 L to 35 L against a constant external pressure
Assume you have a material in which an equal number of electrons and holes are available to transport charge. If the resistivity of this material is 3.15 x 10-1Ω-m and the number of each type of charge carrier is 1 x 1013 cm-3, estimate the mobili..
Problem- The average molecular velocity in a gas sample at 300 K is 500 m/s. The temperature of this gas is increased until the average velocity or its molecule os 1000 m/s. What is the new temperature
What are the concentrations of HOAC and OAC- in a 0.2M acetate buffer pH 5.0? The Ka for acetic acid is 1.70 X 10-5 (pKa = 4.77).
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